[dpdk-stable] patch 'net/enic: fix multi-process operation' has been queued to stable release 17.08.1

[Yuanhan Liu <yliu@fridaylinux.org>]

Hi,

FYI, your patch has been queued to stable release 17.08.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/24/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 8dddd9ffeee9e9c4b03fbbf0cb02a8e2b187de12 Mon Sep 17 00:00:00 2001
From: John Daley <johndale@cisco.com>
Date: Mon, 11 Sep 2017 11:58:33 -0700
Subject: [PATCH] net/enic: fix multi-process operation

[ upstream commit 0e804034dc9a5e27aa3bd9763457cd70e8970b81 ]

- Use rte_malloc() instead of malloc() for the per device 'vdev' structure
  so that it can be shared across processes.
- Only initialize the device if the process type is RTE_PROC_PRIMARY
- Only allow the primary process to do queue setup, start/stop, promisc
  allmulticast, mac add/del, mtu.

Fixes: fefed3d1e62c ("enic: new driver")

Signed-off-by: John Daley <johndale@cisco.com>
Reviewed-by: Aaron Conole <aconole@redhat.com>
---
 doc/guides/nics/features/enic.ini |  1 +
 drivers/net/enic/base/vnic_dev.c  | 10 +++++++--
 drivers/net/enic/enic_ethdev.c    | 43 +++++++++++++++++++++++++++++++++++++++
 drivers/net/enic/enic_main.c      |  7 +++++++
 4 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/doc/guides/nics/features/enic.ini b/doc/guides/nics/features/enic.ini
index 0de3ef5..498341f 100644
--- a/doc/guides/nics/features/enic.ini
+++ b/doc/guides/nics/features/enic.ini
@@ -25,6 +25,7 @@ L3 checksum offload  = Y
 L4 checksum offload  = Y
 Packet type parsing  = Y
 Basic stats          = Y
+Multiprocess aware   = Y
 BSD nic_uio          = Y
 Linux UIO            = Y
 Linux VFIO           = Y
diff --git a/drivers/net/enic/base/vnic_dev.c b/drivers/net/enic/base/vnic_dev.c
index 49b3655..162e9c2 100644
--- a/drivers/net/enic/base/vnic_dev.c
+++ b/drivers/net/enic/base/vnic_dev.c
@@ -1063,7 +1063,7 @@ void vnic_dev_unregister(struct vnic_dev *vdev)
 			vdev->free_consistent(vdev->priv,
 				sizeof(struct vnic_devcmd_fw_info),
 				vdev->fw_info, vdev->fw_info_pa);
-		kfree(vdev);
+		rte_free(vdev);
 	}
 }
 
@@ -1072,7 +1072,13 @@ struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 	unsigned int num_bars)
 {
 	if (!vdev) {
-		vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
+		char name[NAME_MAX];
+		snprintf((char *)name, sizeof(name), "%s-vnic",
+			  pdev->device.name);
+		vdev = (struct vnic_dev *)rte_zmalloc_socket(name,
+					sizeof(struct vnic_dev),
+					RTE_CACHE_LINE_SIZE,
+					pdev->device.numa_node);
 		if (!vdev)
 			return NULL;
 	}
diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
index da8fec2..33a3f87 100644
--- a/drivers/net/enic/enic_ethdev.c
+++ b/drivers/net/enic/enic_ethdev.c
@@ -142,6 +142,10 @@ enicpmd_dev_filter_ctrl(struct rte_eth_dev *dev,
 static void enicpmd_dev_tx_queue_release(void *txq)
 {
 	ENICPMD_FUNC_TRACE();
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	enic_free_wq(txq);
 }
 
@@ -196,6 +200,9 @@ static int enicpmd_dev_tx_queue_setup(struct rte_eth_dev *eth_dev,
 	int ret;
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return -E_RTE_SECONDARY;
+
 	ENICPMD_FUNC_TRACE();
 	if (queue_idx >= ENIC_WQ_MAX) {
 		dev_err(enic,
@@ -272,6 +279,10 @@ static int enicpmd_dev_rx_queue_stop(struct rte_eth_dev *eth_dev,
 static void enicpmd_dev_rx_queue_release(void *rxq)
 {
 	ENICPMD_FUNC_TRACE();
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	enic_free_rq(rxq);
 }
 
@@ -310,6 +321,10 @@ static int enicpmd_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
 	struct enic *enic = pmd_priv(eth_dev);
 
 	ENICPMD_FUNC_TRACE();
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return -E_RTE_SECONDARY;
+
 	/* With Rx scatter support, two RQs are now used on VIC per RQ used
 	 * by the application.
 	 */
@@ -378,6 +393,9 @@ static int enicpmd_dev_configure(struct rte_eth_dev *eth_dev)
 	int ret;
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return -E_RTE_SECONDARY;
+
 	ENICPMD_FUNC_TRACE();
 	ret = enic_set_vnic_res(enic);
 	if (ret) {
@@ -404,6 +422,9 @@ static int enicpmd_dev_start(struct rte_eth_dev *eth_dev)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return -E_RTE_SECONDARY;
+
 	ENICPMD_FUNC_TRACE();
 	return enic_enable(enic);
 }
@@ -416,6 +437,9 @@ static void enicpmd_dev_stop(struct rte_eth_dev *eth_dev)
 	struct rte_eth_link link;
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	ENICPMD_FUNC_TRACE();
 	enic_disable(enic);
 	memset(&link, 0, sizeof(link));
@@ -513,7 +537,11 @@ static void enicpmd_dev_promiscuous_enable(struct rte_eth_dev *eth_dev)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	ENICPMD_FUNC_TRACE();
+
 	enic->promisc = 1;
 	enic_add_packet_filter(enic);
 }
@@ -522,6 +550,9 @@ static void enicpmd_dev_promiscuous_disable(struct rte_eth_dev *eth_dev)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	ENICPMD_FUNC_TRACE();
 	enic->promisc = 0;
 	enic_add_packet_filter(enic);
@@ -531,6 +562,9 @@ static void enicpmd_dev_allmulticast_enable(struct rte_eth_dev *eth_dev)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	ENICPMD_FUNC_TRACE();
 	enic->allmulti = 1;
 	enic_add_packet_filter(enic);
@@ -540,6 +574,9 @@ static void enicpmd_dev_allmulticast_disable(struct rte_eth_dev *eth_dev)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	ENICPMD_FUNC_TRACE();
 	enic->allmulti = 0;
 	enic_add_packet_filter(enic);
@@ -551,6 +588,9 @@ static int enicpmd_add_mac_addr(struct rte_eth_dev *eth_dev,
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return -E_RTE_SECONDARY;
+
 	ENICPMD_FUNC_TRACE();
 	return enic_set_mac_address(enic, mac_addr->addr_bytes);
 }
@@ -559,6 +599,9 @@ static void enicpmd_remove_mac_addr(struct rte_eth_dev *eth_dev, uint32_t index)
 {
 	struct enic *enic = pmd_priv(eth_dev);
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
 	ENICPMD_FUNC_TRACE();
 	enic_del_mac_address(enic, index);
 }
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 1d956cd..9b0439b 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -1181,6 +1181,9 @@ int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
 	old_mtu = eth_dev->data->mtu;
 	config_mtu = enic->config.mtu;
 
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return -E_RTE_SECONDARY;
+
 	if (new_mtu > enic->max_mtu) {
 		dev_err(enic,
 			"MTU not updated: requested (%u) greater than max (%u)\n",
@@ -1332,6 +1335,10 @@ int enic_probe(struct enic *enic)
 
 	dev_debug(enic, " Initializing ENIC PMD\n");
 
+	/* if this is a secondary process the hardware is already initialized */
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return 0;
+
 	enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
 	enic->bar0.len = pdev->mem_resource[0].len;
 
-- 
2.7.4